LED 12 Volt Lead Acid Battery Meter circuit


Posted on Feb 7, 2014

In the circuit, a quad voltage comparator (LM339) is used as a simple bar graph meter to indicate the charge condition of a 12 volt, lead acid battery. A 5 volt reference voltage is connected to each of the (+) inputs of the four comparators and the (-) inputs are connected to successive points along a voltage divider. The LEDs will illuminate when the voltage at the negative (-) input exceeds the reference voltage..


LED 12 Volt Lead Acid Battery Meter circuit
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Feedback oscillator
    Electronic-thermometer
    audio-circuits
    Geomagnetic field detectors
    using a multimeter
    Ultrasonic Proximity Detector Electrical Project
    Doorbell MemoryCircuit
    10 Hz to 10 Khz Voltage Controlled Oscillator
    electric output stator
    Frequency counter Counter schematic
    Halogen Lamp Dimmer With Soft Start
    Programming PIC 16F84A



    Top